Jiang Xiulan talks with a student between classes in Qingxi Central Primary School in Chaerlong village, Wushi town, Huangshan City of east China's Anhui Province, Sept. 7, 2018. Since 1983 when she began her career as a teacher, Jiang has been working in the "one teacher in one school" model in which all the subjects of all the students in the school is taught by a single teacher. Jiang is now giving a curriculum of seven courses in the school where a total of five students study in two grades. (Xinhua/Wang Zhengzhong)